OpenJDK7/amd64 problems

Using openjdk7-1.7.0.92.20100521nb1 on NetBSD 5.0.2/amd64 I am
experiencing some issues related to networking.
For example from i2p logs I see
13:28:02.915 ERROR [JobQueue0 ] org.cybergarage.util.Debug :
java.net.SocketException: Invalid argument
at java.net.PlainDatagramSocketImpl.join(Native Method)
at
java.net.AbstractPlainDatagramSocketImpl.joinGroup(AbstractPlainDatagramSocketImpl.java:184)
at java.net.MulticastSocket.joinGroup(MulticastSocket.java:385)
at org.cybergarage.upnp.ssdp.HTTPMUSocket.open(HTTPMUSocket.java:107)
at
org.cybergarage.upnp.ssdp.SSDPNotifySocket.<init>(SSDPNotifySocket.java:49)
at
org.cybergarage.upnp.ssdp.SSDPNotifySocketList.open(SSDPNotifySocketList.java:67)
at org.cybergarage.upnp.ControlPoint.start(ControlPoint.java:814)
at org.cybergarage.upnp.ControlPoint.start(ControlPoint.java:875)
at net.i2p.router.transport.UPnP.runPlugin(UPnP.java:89)
at net.i2p.router.transport.UPnPManager.start(UPnPManager.java:64)
at
net.i2p.router.transport.TransportManager.startListening(TransportManager.java:140)
at
net.i2p.router.transport.CommSystemFacadeImpl.startup(CommSystemFacadeImpl.java:54)
at
net.i2p.router.startup.BootCommSystemJob.runJob(BootCommSystemJob.java:41)
at net.i2p.router.JobQueueRunner.runCurrentJob(JobQueueRunner.java:145)
at net.i2p.router.JobQueueRunner.run(JobQueueRunner.java:85)
at java.lang.Thread.run(Thread.java:717)
at net.i2p.util.I2PThread.run(I2PThread.java:77)
Similarly, the freenet logs show:
Failed to run STUN to server stun.xten.com: java.io.IOException: Invalid
argument - trying another, report if persistent
java.io.IOException: Invalid argument
at java.net.PlainDatagramSocketImpl.send(Native Method)
at java.net.DatagramSocket.send(DatagramSocket.java:652)
at
plugins.JSTUN.de.javawi.jstun.test.DiscoveryTest_.test1(DiscoveryTest_.java:102)
at
plugins.JSTUN.de.javawi.jstun.test.DiscoveryTest_.test(DiscoveryTest_.java:70)
at plugins.JSTUN.JSTUN.runTest(JSTUN.java:69)
at plugins.JSTUN.JSTUN$DetectorThread.run(JSTUN.java:191)
STUN failed: likely detections=0 unlikely detections=0
I don't know whether it's related but netbeans crashes after the
splash screen.
Best regards,
Marko